|Rank|Peak Name|Elevation|Location|Notes|
|---|---|---|---|---|
|1|Saka Haphong/Mowdok Taung|3,465 ft|Thanchi,Bandarban|Unofficially the highest peak of Bangladesh. 1st summit by English adventurer Ginge Fullen in 2006.|
|2|Zow Tlang/Mowdok Mual|3,353 ft|Thanchi,Bandarban|Elevation measured during the summit expedition by Travelers of Bangladesh in 2012.|
|3|Dumlong|3,314 ft|Belaichori,Rangamati|Highest peak in Rangamati. Elevation measured during the summit expedition by Nature Adventure Club in 2011.|
|4|Jogi Haphong|3,251 ft|Thanchi,Bandarban|Elevation measured during the summit expedition by Travelers of Bangladesh in 2012.|
|5|Keokradong|3,235 ft|Ruma,Bandarban|Most popular trekking route in Bangladesh.|
|6|Rang Tlang|Unmeasured|Belaichori,Rangamati||
|7|Thingdawl Te Tlang|3,149 ft|Ruma,Bandarban|Highest peak of Lowmbok row range. Elevation measured during the summit expedition by BD Explorer in 2012.|
|8|Mukhra Thuthai haphong|3,129 ft|Belaichori,Rangamati|Elevation measured during the summit expedition by BD Explorer in 2013.|
|9|Kapital/Capital|3,090 ft|Ruma,Bandarban|This flat mountain top once used as a hide out place by separatist group from Mizoram.|
|10|Kreikung Taung/Ngaramh Tlang|3,083 ft|Ruma,Bandarban|Elevation measured during the summit expedition by BD Explorer in 2012.|
|11|Taung Mey|3,060 ft|Ruma,Bandarban|Near Keokradong peak.|
|12|Laisra Haphong|3,041 ft|Belaichori,Rangamati|Elevation measured during the summit expedition by BD Explorer in 2013.|
|13|Rang Tlang 2|Unmeasured|Belaichori,Rangamati||
|14|Nasai Hum|3,005 ft|Thanchi,Bandarban|Most south-east corner peak of Bangladesh. Elevation measured during the joint expedition of Sangu source by D-way expeditors & Nature Adventure Club in 2011.|

Question: how many feet separate the 7th and 8th ranked highest peaks?
Answer: 20